Fix single documentation search on Android (#941)

Fix single documentation search on Android

assets/javascripts/lib/util.coffee

@@ -352,6 +352,10 @@ isIE = null
 $.isIE = ->
   isIE ?= navigator.userAgent?.indexOf('MSIE') >= 0 || navigator.userAgent?.indexOf('rv:11.0') >= 0
 
+isChromeForAndroid = null
+$.isChromeForAndroid = ->
+  isChromeForAndroid ?= navigator.userAgent?.indexOf('Android') >= 0 && /Chrome\/([.0-9])+ Mobile/.test(navigator.userAgent)
+
 isAndroid = null
 $.isAndroid = ->
   isAndroid ?= navigator.userAgent?.indexOf('Android') >= 0

assets/javascripts/views/search/search_scope.coffee

@@ -8,6 +8,7 @@ class app.views.SearchScope extends app.View
   @events:
     click: 'onClick'
     keydown: 'onKeydown'
+    textInput: 'onTextInput'
 
   @routes:
     after: 'afterRoute'
@@ -88,6 +89,11 @@ class app.views.SearchScope extends app.View
     @trigger 'change', null, previousDoc
     return
 
+  doScopeSearch: (event) =>
+    @search @input.value[0...@input.selectionStart]
+    $.stopEvent(event) if @doc
+    return
+
   onClick: (event) =>
     if event.target is @tag
       @reset()
@@ -99,12 +105,17 @@ class app.views.SearchScope extends app.View
       if @doc and @input.selectionEnd is 0
         @reset()
         $.stopEvent(event)
-    else if not @doc and @input.value
+    else if not @doc and @input.value and not $.isChromeForAndroid()
       return if event.ctrlKey or event.metaKey or event.altKey or event.shiftKey
       if event.which is 9 or # tab
          (event.which is 32 and app.isMobile()) # space
-        @search @input.value[0...@input.selectionStart]
-        $.stopEvent(event) if @doc
+        @doScopeSearch(event)
+    return
+
+  onTextInput: (event) =>
+    return unless $.isChromeForAndroid()
+    if not @doc and @input.value and event.data == ' '
+      @doScopeSearch(event)
     return
 
   extractHashValue: ->